Incubator.



m. 889,697. PATENTED JUNE 2, 1968.

'- G. H; LEE.

INGUBATOR.

APPLICATION FILED JUNE 25. 1907.

WITNESSES ATTORNEYS V 1n: NORRIS PETERS 60., wAsnmc-rau, n. c.

. below the i GEORGE HOWARD LEE,

PATENT OFFICE.

OF OMAHA, NEBRASKA.

IN CUB ATOR.

Specification of Letters Patent.

Patented June 2, 1908.

Application filed June 25, 1907. Serial No. 380,740.

To all whom'it may concern:

Be it known that I, GEORGE HOWARD LEE, a citizen of the United. States, and a resident of Omaha, in the county of Douglas and State of Nebraska, have invented a new and Improved Incubator, of which the following is a full, clear, and exact description.

This invention relates to incubators, and especially to means for ventilating the same.

The invention is especially applicable to the type of incubator patented to me October 2, 1906, Serial No. 832,395.

The object of the invention is to provide an improved construction of incubator which will insure a perfect air-tight joint between the egg-chamber and treating chamber, and further to provide improved means for ventilating the egg-chamber.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all thefigures.

Figure 1 is a vertical longitudinal section through an incubator provided with my invention; this view section on the line 1-1 of Fig. 2; Fig. 2 is a vertical cross section through the incubator, taken on the line 2-2 of Fig. 1; and Fig. 3 is a horizontal section on the line 33 of Fig. 1 and lookingupwardly; this view illustrates one construction of a damper. for regulating the ventilating means.

Referring more particularly to the parts, 1 represents the incubator body, which is of the usual box form. It is divided by a horizontal diaphragm 2 into a heating chamber 3 above the diaphragm, and an egg chamber 4 same. In the egg chamber 4 the usual egg tray 5 is provided. Except at the front this diaphragm extends completely through the inner wall Awith its edges against the outer wall B and is secured between cleats 45 in the double wall as shown.

The walls of the incubator body are made double so that an air s ace 6 is provided on all sides. Except on the end wall near the heater, this space is filled with cotton or similar material. Heat is supplied to the heating chamber 3 by means of a lamp not shown, the flame of which is disposed. under the chimney 7. This chimney is surrounded in alinement as suggested, the entrance of air into the hood from the outside is permitted, but when they are closed, the entrance of air at this point is cut off. The damper is provided with a knob or ring 13 as indicated. Near its lower portion, the in terior of the hood 8 is in communication with the air space 6 through the medium of a short pipe or nipple 15. The up er endof the hood is open and is partially c osed by a damper 8. as shown.

may be considered as a.

In the lower portion of the egg chamber, I provide a horizontally disposed ventilating outlet tube 16. This tube extends from end in communication with the air space at the end of the body. Thus, it will be seen that this tube has no connection with the outer air it is simply for the purpose of o ening communication between the egg 0 amber and the nip le 15, and for this purpose it is provided th of small openings orperforations 17. This tube 16 is dis osed near the rear wall of the incubator as s own in Fig. 2," that is, it is adjacent to the wall which is opposite to the door 18.

In the upper portion of the egg chamber and above the tube 16, I provide a ventilating inlet tube 19. This tube extends completely through the incubator and through the outer walls thereof, the ends of the tube being normally closed by caps 20 pivotally attached to the outer side of the end walls of the body as described in the patent referred to above. Throughout its length within the egg chamber, this tube is provided with a plurality of openings or perforations 21 through which air may pass when flowing into the egg chamber.

In the upper and lower portion of the heating chamber a plurality of outlet tubes 22 are I provided, which extend completely through by a hood 8 of enlarged diameter, and from i to end of the incubator, and one of its ends is roughout its length with a plurality I the body of the incubator, so that their ends project beyond the walls thereof, as indicated most clearly at the left of Fig. 1. The'ends of these tubes are open, and throughout their length within the heating chamber, they are provided with openings or perforations 23.

In the operation of the incubator, the heated gases from the lamp pass up the chimney 7 and through the flue 9 into the heating chamber. In this way an upward draft is created in the hood surrounding the chimney. This creates a suction in the tube 15, so that the air in the air space 6 is drawn into the hood. In this way an inlet draft is produced in the openings 17 in the ventilating tube 16, so that the air from the interior of the egg chamber is drawn off. The damper plate 13 admits of a nice regulation of the degree of draft produced, for if this damper is closed, the draft will be increased through the openings 17, and vice versa. When the caps 20 are opened, a copious supply of fresh air is admitted through the tube 19 and the openings 21 into the upper portion of the egg chamber. In this way the cool air from the room is admitted near the diaphragm of the egg chamber, which is the hi hest heated point of the chamber. The coo air near the bottom of the egg chamber is being constantly drawn ofi through the tube 16. In this way the .even temperature of the egg chamber is maintained and nicely controlled.

Arranging the diaphragm 2 so that its edges pass through the inner wall is a valuable feature, as 1t renders the joint at the diaphragm absolutely air-tight. It is difli cult to make an air-tight joint at this point where the edges of the diaphragm are clamped between cleats on the inner face of the inner wall. In addition to this, the construction is neater and dispenses with cleats or moldings in the upper portion of the egg chamber.

Having thus described my invention, I

name to this specification in the claim as new and desire to secure by Letters Patent:

1. An incubator body having an egg chamber with a ventilating tube passing therefrom, a flue leading into said body, a hood having an opening below and communicating with said flue, a chimney from which heated gases escape in an upward direction into the interior of said hood, whereby an u ward air current is induced within said hoo and entering through the said opening of said hood, and a damper regulating said opening, said ventilating tube being connected with said hood to withdraw foul air from said egg chamber.

2. An incubator body having a double wall, a dia hragm dividing, said body into an egg cham er and a heating chamber, and passing into said double wall, and cleats within said double wall securing the edges of said diaphragm.

3. An incubator having a chimney at the side thereof to receive a lamp, a hood surrounding said chimney with openings at the base thereof and having a laterally extending tube projecting into the incubator, said chimney being open above and delivering an upward current of gases i to said hood, inducing an upward draft of air through said hood and through said opening, and an annular dam er at the base of said hood, regu lating the egree of opening of said openings, said incubator having an egg chamber communicating with said hood, whereby the upward draft in said hood withdraws the foul air from said egg chamber.

In testimony. whereof I have signed my presence of two subscribing witnesses.

GEORGE I-IOWVARD LEE.

Witnesses:

F. E. CoATswoR'rH, It. A. JonNsToN. 

